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Comprehensive
Dictionary Suite
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brontosaur a huge dinosaur that only ate plants. Brontosaurs had heavy bodies and very long necks and tails. They lived over 100 million years ago. Brontosaurs are now called apatosaurs by scientists who study dinosaurs.
duck-billed dinosaur any dinosaur of the Hadrosauridae family, having a broad, flat snout for grazing.
hadrosaur any dinosaur of the Hadrosauridae family, having a broad, flat snout for grazing; also known as a "duck-billed dinosaur."
theropod any dinosaur of the suborder Theropoda, such as Tyrannosaurus and Velociraptor, characterized by hollow bones and three-toed limbs, usually possessing short forelimbs and walking on two legs.
Theropoda a suborder of dinosaur characterized by hollow bones and three-toed limbs.
T. rex shortened form of "Tyrannosaurus rex," a large carnivorous North American dinosaur of the Cretaceous period that had small forelimbs and walked on its hind legs; tyrannosaur.
Tyrannosaur a large carnivorous North American dinosaur of the Cretaceous period that had small forelimbs and walked on its hind legs; Tyrannosaurus rex.
Tyrannosaurus rex a large carnivorous North American dinosaur of the Cretaceous period that had small forelimbs and walked on its hind legs (often shortened to "T. rex"); Tyrannosaur.
velociraptor a carnivorous, bipedal dinosaur of the genus Velociraptor, having feathers, a long tail, and a sickle-shaped claw on each hind foot.